After posting a new shot from the production on his Instagram page, one fan popped the question 'MPAA rating???'

Phillip replied: “It will be Rated R. I've been asked this a lot. Just assumed people knew. Sorry.”

Judging by the distinctly Taxi Driver-esque vibes from the movie's first trailer, in which we see Joaquin Phoenix's put-upon stand up comedian slowly becoming unhinged, an R-rating seems entirely appropriate.

That means that either a 15 or an 18 rating will be a likelihood in the UK (though probably a 15), depending on the severity of the adult themes going on.

Few superhero or comicbook-based movies go for the full, audience-limiting adult rating, though there have been a handful in year recent years, from Watchmen and Deadpool to Kick-Ass and Logan.